Played on a 10x10 board with two new pieces - the General and the Adjutant.
Emperor's Game is played on a 10 x 10 board with two additional pieces - the General and The Adjutant. The General specifically is very powerful, being a combination of a Queen and Knight.
Starting Position
The General and Adjutant start either side of the King and Queen
Board is interactive - move a piece
Pawns can advance up to three squares on their first movement. In addition, Emperor's Game
General
The General like a Queen and a Knight combined.
Moves like a Knight that can also attack the diagonals and horizontals like a Queen.
Board is interactive - move a piece
Adjutant
The Adjutant moves like a Bishop and Knight combined
Moves like a Knight and can also attack the diagonals like a Bishop.
Board is interactive - move a piece
Pawn Promotion
A Pawn can also promote to an General, Adjutant, Queen, Rook, Knight, or Bishop - but only if that piece has previously been captured.
Castling
The King moves 4 squares for queenside castling, and 3 squares for kingside.
The King moves four squares queenside and three squares kingside castling.
Board is interactive - move a piece
In Emperor's Game
En Passant captures are valid on both squares during a move 3 square advance.
The General and Adjutant start either side of the King and Queen